PCB blank board Size: 80mm x 60mm
The circular circuit is the running water lamp circuit, which is composed of CD4017, NE555 and leds, which can be used to work after being welded.
Add 2pcs of QFP44 chip, double sided component layout, double welding.

SMD SMT Welding Practice Soldering Board NE555 CD4017 Diy Kit

EK1885

PCB blank board Size: 80mm x 60mm
The circular circuit is the running water lamp circuit, which is composed of CD4017, NE555 and leds, which can be used to work after being welded.
Add 2pcs of QFP44 chip, double sided component layout, double welding....